4 Link or springs

Im torn between 4 link and springs my self. Im building a 69 dart street/strip. Im doing a 451 turbo motor. Full interior on 325 50 15s. I hang out with alot of mustang guys and I was set on the RMS linx kit but I don't think it will hold up to 1000+ hp. I know alot of guys run caltracs but have any of y'all on here seen the SRD assassin bars from Smith Racecraft. There's alot of guys on yellowbullet going pretty quick with their stuff. Alot more adjustment than the caltracs.